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      <h1>Source code for isek.node.isek_center_registry</h1><div class="highlight"><pre>
<span></span><code><span id="line-1"><span class="kn">import</span><span class="w"> </span><span class="nn">json</span>
</span><span id="line-2"><span class="kn">from</span><span class="w"> </span><span class="nn">typing</span><span class="w"> </span><span class="kn">import</span> <span class="n">Optional</span><span class="p">,</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">Any</span> <span class="c1"># Added Any</span>
</span><span id="line-3">
</span><span id="line-4"><span class="kn">import</span><span class="w"> </span><span class="nn">requests</span> <span class="c1"># type: ignore # If requests doesn&#39;t have stubs or for explicit ignoring</span>
</span><span id="line-5"><span class="kn">from</span><span class="w"> </span><span class="nn">requests.exceptions</span><span class="w"> </span><span class="kn">import</span> <span class="n">RequestException</span> <span class="c1"># For better error handling</span>
</span><span id="line-6">
</span><span id="line-7"><span class="kn">from</span><span class="w"> </span><span class="nn">isek.util.logger</span><span class="w"> </span><span class="kn">import</span> <span class="n">logger</span> <span class="c1"># Assuming logger is configured</span>
</span><span id="line-8"><span class="kn">from</span><span class="w"> </span><span class="nn">isek.node.registry</span><span class="w"> </span><span class="kn">import</span> <span class="n">Registry</span> <span class="c1"># Assuming Registry is an ABC or base class</span>
</span><span id="line-9">
</span><span id="line-10"><span class="c1"># Type alias for node metadata and node info</span>
</span><span id="line-11"><span class="n">NodeMetadata</span> <span class="o">=</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span>
</span><span id="line-12"><span class="n">NodeInfo</span> <span class="o">=</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="c1"># e.g., {&quot;node_id&quot;: str, &quot;host&quot;: str, &quot;port&quot;: int, &quot;metadata&quot;: NodeMetadata}</span>
</span><span id="line-13">
</span><span id="line-14">
<div class="viewcode-block" id="IsekCenterRegistry">
<a class="viewcode-back" href="../../../api/node.html#isek.node.IsekCenterRegistry">[docs]</a>
</span><span id="line-15"><span class="k">class</span><span class="w"> </span><span class="nc">IsekCenterRegistry</span><span class="p">(</span><span class="n">Registry</span><span class="p">):</span>
</span><span id="line-16"><span class="w">    </span><span class="sd">&quot;&quot;&quot;</span>
</span><span id="line-17"><span class="sd">    An implementation of the :class:`~isek.node.registry.Registry` interface</span>
</span><span id="line-18"><span class="sd">    that interacts with a centralized &quot;Isek Center&quot; service via HTTP API calls.</span>
</span><span id="line-19">
</span><span id="line-20"><span class="sd">    This registry delegates node registration, deregistration, lease renewal,</span>
</span><span id="line-21"><span class="sd">    and discovery to an external Isek Center. All operations involve sending</span>
</span><span id="line-22"><span class="sd">    HTTP requests to predefined endpoints on this central service.</span>
</span><span id="line-23"><span class="sd">    &quot;&quot;&quot;</span>
</span><span id="line-24">
</span><span id="line-25">    <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span>
</span><span id="line-26">                 <span class="n">host</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">&quot;localhost&quot;</span><span class="p">,</span> <span class="c1"># Made non-optional with default</span>
</span><span id="line-27">                 <span class="n">port</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">8088</span><span class="p">,</span>       <span class="c1"># Made non-optional with default</span>
</span><span id="line-28">                 <span class="p">):</span>
</span><span id="line-29"><span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
</span><span id="line-30"><span class="sd">        Initializes the IsekCenterRegistry.</span>
</span><span id="line-31">
</span><span id="line-32"><span class="sd">        :param host: The hostname or IP address of the Isek Center service.</span>
</span><span id="line-33"><span class="sd">                     Defaults to &quot;localhost&quot;.</span>
</span><span id="line-34"><span class="sd">        :type host: str</span>
</span><span id="line-35"><span class="sd">        :param port: The port number on which the Isek Center service is listening.</span>
</span><span id="line-36"><span class="sd">                     Defaults to 8088.</span>
</span><span id="line-37"><span class="sd">        :type port: int</span>
</span><span id="line-38"><span class="sd">        &quot;&quot;&quot;</span>
</span><span id="line-39">        <span class="k">if</span> <span class="ow">not</span> <span class="n">host</span><span class="p">:</span> <span class="c1"># Should not happen with default, but good practice</span>
</span><span id="line-40">            <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">&quot;Host for Isek Center cannot be empty.&quot;</span><span class="p">)</span>
</span><span id="line-41">        <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">port</span><span class="p">,</span> <span class="nb">int</span><span class="p">)</span> <span class="ow">or</span> <span class="ow">not</span> <span class="p">(</span><span class="mi">0</span> <span class="o">&lt;</span> <span class="n">port</span> <span class="o">&lt;</span> <span class="mi">65536</span><span class="p">):</span>
</span><span id="line-42">            <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Invalid port number for Isek Center: </span><span class="si">{</span><span class="n">port</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-43">
</span><span id="line-44">        <span class="bp">self</span><span class="o">.</span><span class="n">center_address</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">&quot;http://</span><span class="si">{</span><span class="n">host</span><span class="si">}</span><span class="s2">:</span><span class="si">{</span><span class="n">port</span><span class="si">}</span><span class="s2">&quot;</span>
</span><span id="line-45">        <span class="c1"># self.node_info: NodeInfo = {} # This instance variable seems to store the last registered node&#39;s info</span>
</span><span id="line-46">                                     <span class="c1"># by this instance, which might be confusing if multiple nodes use</span>
</span><span id="line-47">                                     <span class="c1"># the same registry instance. Consider if this state is necessary at instance level.</span>
</span><span id="line-48">                                     <span class="c1"># For now, I&#39;ll assume it&#39;s for the node this client represents.</span>
</span><span id="line-49">        <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;IsekCenterRegistry initialized. Center address: </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">center_address</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-50">
</span><span id="line-51">    <span class="k">def</span><span class="w"> </span><span class="nf">_handle_response</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">response</span><span class="p">:</span> <span class="n">requests</span><span class="o">.</span><span class="n">Response</span><span class="p">,</span> <span class="n">operation_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]:</span>
</span><span id="line-52"><span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
</span><span id="line-53"><span class="sd">        Helper method to handle HTTP responses from the Isek Center.</span>
</span><span id="line-54">
</span><span id="line-55"><span class="sd">        Checks for successful HTTP status codes and expected JSON structure.</span>
</span><span id="line-56">
</span><span id="line-57"><span class="sd">        :param response: The `requests.Response` object.</span>
</span><span id="line-58"><span class="sd">        :type response: requests.Response</span>
</span><span id="line-59"><span class="sd">        :param operation_name: A string describing the operation (e.g., &quot;register node&quot;).</span>
</span><span id="line-60"><span class="sd">        :type operation_name: str</span>
</span><span id="line-61"><span class="sd">        :return: The parsed JSON response data if successful.</span>
</span><span id="line-62"><span class="sd">        :rtype: typing.Dict[str, typing.Any]</span>
</span><span id="line-63"><span class="sd">        :raises HTTPError: If the HTTP request itself failed (e.g., 4xx, 5xx status codes).</span>
</span><span id="line-64"><span class="sd">        :raises ConnectionError: If there was a network problem.</span>
</span><span id="line-65"><span class="sd">        :raises Timeout: If the request timed out.</span>
</span><span id="line-66"><span class="sd">        :raises RuntimeError: If the Isek Center returns a non-200 &#39;code&#39; in its JSON response.</span>
</span><span id="line-67"><span class="sd">        :raises ValueError: If the response content is not valid JSON.</span>
</span><span id="line-68"><span class="sd">        &quot;&quot;&quot;</span>
</span><span id="line-69">        <span class="n">response</span><span class="o">.</span><span class="n">raise_for_status</span><span class="p">()</span> <span class="c1"># Raises HTTPError for bad responses (4XX or 5XX)</span>
</span><span id="line-70">        <span class="k">try</span><span class="p">:</span>
</span><span id="line-71">            <span class="n">response_json</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">=</span> <span class="n">response</span><span class="o">.</span><span class="n">json</span><span class="p">()</span>
</span><span id="line-72">        <span class="k">except</span> <span class="n">json</span><span class="o">.</span><span class="n">JSONDecodeError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
</span><span id="line-73">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to decode JSON response during </span><span class="si">{</span><span class="n">operation_name</span><span class="si">}</span><span class="s2"> &quot;</span>
</span><span id="line-74">                         <span class="sa">f</span><span class="s2">&quot;from </span><span class="si">{</span><span class="n">response</span><span class="o">.</span><span class="n">url</span><span class="si">}</span><span class="s2">. Response text: &#39;</span><span class="si">{</span><span class="n">response</span><span class="o">.</span><span class="n">text</span><span class="p">[:</span><span class="mi">200</span><span class="p">]</span><span class="si">}</span><span class="s2">...&#39;&quot;</span><span class="p">)</span>
</span><span id="line-75">            <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Invalid JSON response received during </span><span class="si">{</span><span class="n">operation_name</span><span class="si">}</span><span class="s2">.&quot;</span><span class="p">)</span> <span class="kn">from</span><span class="w"> </span><span class="nn">e</span>
</span><span id="line-76">
</span><span id="line-77">        <span class="k">if</span> <span class="n">response_json</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;code&#39;</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">200</span><span class="p">:</span>
</span><span id="line-78">            <span class="n">error_message</span> <span class="o">=</span> <span class="n">response_json</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;message&#39;</span><span class="p">,</span> <span class="s1">&#39;Unknown error from Isek Center.&#39;</span><span class="p">)</span>
</span><span id="line-79">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="n">operation_name</span><span class="o">.</span><span class="n">capitalize</span><span class="p">()</span><span class="si">}</span><span class="s2"> failed at Isek Center. &quot;</span>
</span><span id="line-80">                         <span class="sa">f</span><span class="s2">&quot;Code: </span><span class="si">{</span><span class="n">response_json</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;code&#39;</span><span class="p">)</span><span class="si">}</span><span class="s2">, Message: </span><span class="si">{</span><span class="n">error_message</span><span class="si">}</span><span class="s2">, &quot;</span>
</span><span id="line-81">                         <span class="sa">f</span><span class="s2">&quot;Full response: </span><span class="si">{</span><span class="n">response_json</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-82">            <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="n">operation_name</span><span class="o">.</span><span class="n">capitalize</span><span class="p">()</span><span class="si">}</span><span class="s2"> failed at Isek Center: </span><span class="si">{</span><span class="n">error_message</span><span class="si">}</span><span class="s2"> (Code: </span><span class="si">{</span><span class="n">response_json</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;code&#39;</span><span class="p">)</span><span class="si">}</span><span class="s2">)&quot;</span><span class="p">)</span>
</span><span id="line-83">        <span class="k">return</span> <span class="n">response_json</span>
</span><span id="line-84">
</span><span id="line-85">
<div class="viewcode-block" id="IsekCenterRegistry.register_node">
<a class="viewcode-back" href="../../../api/node.html#isek.node.IsekCenterRegistry.register_node">[docs]</a>
</span><span id="line-86">    <span class="k">def</span><span class="w"> </span><span class="nf">register_node</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">node_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">host</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">port</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">metadata</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">NodeMetadata</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="line-87"><span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
</span><span id="line-88"><span class="sd">        Registers a node with the Isek Center.</span>
</span><span id="line-89">
</span><span id="line-90"><span class="sd">        Sends a POST request with node information to the center&#39;s `/isek_center/register` endpoint.</span>
</span><span id="line-91">
</span><span id="line-92"><span class="sd">        :param node_id: The unique identifier for the node.</span>
</span><span id="line-93"><span class="sd">        :type node_id: str</span>
</span><span id="line-94"><span class="sd">        :param host: The hostname or IP address where the node can be reached.</span>
</span><span id="line-95"><span class="sd">        :type host: str</span>
</span><span id="line-96"><span class="sd">        :param port: The port number on which the node is listening.</span>
</span><span id="line-97"><span class="sd">        :type port: int</span>
</span><span id="line-98"><span class="sd">        :param metadata: Optional dictionary of key-value pairs providing additional</span>
</span><span id="line-99"><span class="sd">                         information about the node. Defaults to an empty dictionary.</span>
</span><span id="line-100"><span class="sd">        :type metadata: typing.Optional[NodeMetadata]</span>
</span><span id="line-101"><span class="sd">        :raises RuntimeError: If the Isek Center returns an error code in its response.</span>
</span><span id="line-102"><span class="sd">        :raises requests.exceptions.RequestException: For network errors or HTTP error statuses.</span>
</span><span id="line-103"><span class="sd">        &quot;&quot;&quot;</span>
</span><span id="line-104">        <span class="n">register_url</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">center_address</span><span class="si">}</span><span class="s2">/isek_center/register&quot;</span>
</span><span id="line-105">        <span class="n">current_node_info</span><span class="p">:</span> <span class="n">NodeInfo</span> <span class="o">=</span> <span class="p">{</span> <span class="c1"># Use a local variable for current operation</span>
</span><span id="line-106">            <span class="s2">&quot;node_id&quot;</span><span class="p">:</span> <span class="n">node_id</span><span class="p">,</span>
</span><span id="line-107">            <span class="s2">&quot;host&quot;</span><span class="p">:</span> <span class="n">host</span><span class="p">,</span>
</span><span id="line-108">            <span class="s2">&quot;port&quot;</span><span class="p">:</span> <span class="n">port</span><span class="p">,</span>
</span><span id="line-109">            <span class="s2">&quot;metadata&quot;</span><span class="p">:</span> <span class="n">metadata</span> <span class="ow">or</span> <span class="p">{}</span>
</span><span id="line-110">        <span class="p">}</span>
</span><span id="line-111">        <span class="c1"># self.node_info = current_node_info # If self.node_info is intended to store this</span>
</span><span id="line-112">
</span><span id="line-113">        <span class="k">try</span><span class="p">:</span>
</span><span id="line-114">            <span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Registering node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; at </span><span class="si">{</span><span class="n">register_url</span><span class="si">}</span><span class="s2"> with data: </span><span class="si">{</span><span class="n">current_node_info</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-115">            <span class="n">response</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">post</span><span class="p">(</span><span class="n">url</span><span class="o">=</span><span class="n">register_url</span><span class="p">,</span> <span class="n">json</span><span class="o">=</span><span class="n">current_node_info</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="mi">10</span><span class="p">)</span> <span class="c1"># Added timeout</span>
</span><span id="line-116">            <span class="n">response_data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_handle_response</span><span class="p">(</span><span class="n">response</span><span class="p">,</span> <span class="sa">f</span><span class="s2">&quot;register node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39;&quot;</span><span class="p">)</span>
</span><span id="line-117">            <span class="c1"># Assuming response_data might contain useful info, e.g., lease ID or confirmation details</span>
</span><span id="line-118">            <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; registered successfully. &quot;</span>
</span><span id="line-119">                        <span class="sa">f</span><span class="s2">&quot;Isek Center response: </span><span class="si">{</span><span class="n">response_data</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;message&#39;</span><span class="p">,</span><span class="w"> </span><span class="s1">&#39;OK&#39;</span><span class="p">)</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-120">        <span class="k">except</span> <span class="n">RequestException</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
</span><span id="line-121">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to register node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; due to a network/HTTP error: </span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</span><span id="line-122">            <span class="k">raise</span> <span class="c1"># Re-raise the requests exception</span>
</span><span id="line-123">        <span class="k">except</span> <span class="p">(</span><span class="ne">RuntimeError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">)</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> <span class="c1"># From _handle_response</span>
</span><span id="line-124">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to register node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; due to Isek Center error: </span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</span><span id="line-125">            <span class="k">raise</span> <span class="c1"># Re-raise the application-level error</span></div>

</span><span id="line-126">
<div class="viewcode-block" id="IsekCenterRegistry.lease_refresh">
<a class="viewcode-back" href="../../../api/node.html#isek.node.IsekCenterRegistry.lease_refresh">[docs]</a>
</span><span id="line-127">    <span class="k">def</span><span class="w"> </span><span class="nf">lease_refresh</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">node_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="line-128"><span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
</span><span id="line-129"><span class="sd">        Refreshes the lease for a registered node with the Isek Center.</span>
</span><span id="line-130">
</span><span id="line-131"><span class="sd">        Sends a POST request with the `node_id` to the center&#39;s `/isek_center/renew` endpoint.</span>
</span><span id="line-132">
</span><span id="line-133"><span class="sd">        :param node_id: The ID of the node whose lease needs to be refreshed.</span>
</span><span id="line-134"><span class="sd">        :type node_id: str</span>
</span><span id="line-135"><span class="sd">        :raises RuntimeError: If the Isek Center returns an error code in its response.</span>
</span><span id="line-136"><span class="sd">        :raises requests.exceptions.RequestException: For network errors or HTTP error statuses.</span>
</span><span id="line-137"><span class="sd">        &quot;&quot;&quot;</span>
</span><span id="line-138">        <span class="n">lease_refresh_url</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">center_address</span><span class="si">}</span><span class="s2">/isek_center/renew&quot;</span>
</span><span id="line-139">        <span class="n">payload</span> <span class="o">=</span> <span class="p">{</span><span class="s2">&quot;node_id&quot;</span><span class="p">:</span> <span class="n">node_id</span><span class="p">}</span>
</span><span id="line-140">
</span><span id="line-141">        <span class="k">try</span><span class="p">:</span>
</span><span id="line-142">            <span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Refreshing lease for node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; at </span><span class="si">{</span><span class="n">lease_refresh_url</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-143">            <span class="n">response</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">post</span><span class="p">(</span><span class="n">url</span><span class="o">=</span><span class="n">lease_refresh_url</span><span class="p">,</span> <span class="n">json</span><span class="o">=</span><span class="n">payload</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="mi">5</span><span class="p">)</span> <span class="c1"># Added timeout</span>
</span><span id="line-144">            <span class="n">response_data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_handle_response</span><span class="p">(</span><span class="n">response</span><span class="p">,</span> <span class="sa">f</span><span class="s2">&quot;refresh lease for node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39;&quot;</span><span class="p">)</span>
</span><span id="line-145">            <span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; lease refreshed successfully. &quot;</span>
</span><span id="line-146">                         <span class="sa">f</span><span class="s2">&quot;Isek Center response: </span><span class="si">{</span><span class="n">response_data</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;message&#39;</span><span class="p">,</span><span class="w"> </span><span class="s1">&#39;OK&#39;</span><span class="p">)</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-147">        <span class="k">except</span> <span class="n">RequestException</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
</span><span id="line-148">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to refresh lease for node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; due to a network/HTTP error: </span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</span><span id="line-149">            <span class="k">raise</span>
</span><span id="line-150">        <span class="k">except</span> <span class="p">(</span><span class="ne">RuntimeError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">)</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
</span><span id="line-151">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to refresh lease for node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; due to Isek Center error: </span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</span><span id="line-152">            <span class="k">raise</span></div>

</span><span id="line-153">
</span><span id="line-154">
<div class="viewcode-block" id="IsekCenterRegistry.get_available_nodes">
<a class="viewcode-back" href="../../../api/node.html#isek.node.IsekCenterRegistry.get_available_nodes">[docs]</a>
</span><span id="line-155">    <span class="k">def</span><span class="w"> </span><span class="nf">get_available_nodes</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">NodeInfo</span><span class="p">]:</span>
</span><span id="line-156"><span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
</span><span id="line-157"><span class="sd">        Retrieves information about all currently available nodes from the Isek Center.</span>
</span><span id="line-158">
</span><span id="line-159"><span class="sd">        Sends a GET request to the center&#39;s `/isek_center/available_nodes` endpoint.</span>
</span><span id="line-160"><span class="sd">        The expected response structure from Isek Center is a JSON object with a &#39;data&#39; key,</span>
</span><span id="line-161"><span class="sd">        which in turn has an &#39;available_nodes&#39; key containing the dictionary of nodes.</span>
</span><span id="line-162">
</span><span id="line-163"><span class="sd">        :return: A dictionary where keys are node IDs and values are dictionaries</span>
</span><span id="line-164"><span class="sd">                 containing the node information (host, port, metadata, etc.)</span>
</span><span id="line-165"><span class="sd">                 as provided by the Isek Center.</span>
</span><span id="line-166"><span class="sd">        :rtype: typing.Dict[str, NodeInfo]</span>
</span><span id="line-167"><span class="sd">        :raises RuntimeError: If the Isek Center returns an error code or an unexpected data structure.</span>
</span><span id="line-168"><span class="sd">        :raises requests.exceptions.RequestException: For network errors or HTTP error statuses.</span>
</span><span id="line-169"><span class="sd">        &quot;&quot;&quot;</span>
</span><span id="line-170">        <span class="n">available_nodes_url</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">center_address</span><span class="si">}</span><span class="s2">/isek_center/available_nodes&quot;</span>
</span><span id="line-171">        <span class="k">try</span><span class="p">:</span>
</span><span id="line-172">            <span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Fetching available nodes from </span><span class="si">{</span><span class="n">available_nodes_url</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-173">            <span class="n">response</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">url</span><span class="o">=</span><span class="n">available_nodes_url</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="mi">10</span><span class="p">)</span> <span class="c1"># Added timeout</span>
</span><span id="line-174">            <span class="n">response_data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_handle_response</span><span class="p">(</span><span class="n">response</span><span class="p">,</span> <span class="s2">&quot;get available nodes&quot;</span><span class="p">)</span>
</span><span id="line-175">
</span><span id="line-176">            <span class="n">nodes_data</span> <span class="o">=</span> <span class="n">response_data</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;data&#39;</span><span class="p">,</span> <span class="p">{})</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;available_nodes&#39;</span><span class="p">)</span>
</span><span id="line-177">            <span class="k">if</span> <span class="n">nodes_data</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">nodes_data</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
</span><span id="line-178">                <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">&quot;Isek Center response for available nodes is missing &#39;data.available_nodes&#39; &quot;</span>
</span><span id="line-179">                             <span class="sa">f</span><span class="s2">&quot;or it&#39;s not a dictionary. Response: </span><span class="si">{</span><span class="n">response_data</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-180">                <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">&quot;Invalid data structure for available nodes received from Isek Center.&quot;</span><span class="p">)</span>
</span><span id="line-181">            <span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Successfully fetched </span><span class="si">{</span><span class="nb">len</span><span class="p">(</span><span class="n">nodes_data</span><span class="p">)</span><span class="si">}</span><span class="s2"> available nodes.&quot;</span><span class="p">)</span>
</span><span id="line-182">            <span class="k">return</span> <span class="n">nodes_data</span> <span class="c1"># type: ignore # If linter complains about Dict[str, NodeInfo] vs Dict[str, Any]</span>
</span><span id="line-183">        <span class="k">except</span> <span class="n">RequestException</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
</span><span id="line-184">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to get available nodes due to a network/HTTP error: </span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</span><span id="line-185">            <span class="k">raise</span>
</span><span id="line-186">        <span class="k">except</span> <span class="p">(</span><span class="ne">RuntimeError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">)</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
</span><span id="line-187">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to get available nodes due to Isek Center error: </span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</span><span id="line-188">            <span class="k">raise</span></div>

</span><span id="line-189">
<div class="viewcode-block" id="IsekCenterRegistry.deregister_node">
<a class="viewcode-back" href="../../../api/node.html#isek.node.IsekCenterRegistry.deregister_node">[docs]</a>
</span><span id="line-190">    <span class="k">def</span><span class="w"> </span><span class="nf">deregister_node</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">node_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="line-191"><span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
</span><span id="line-192"><span class="sd">        Deregisters a node from the Isek Center.</span>
</span><span id="line-193">
</span><span id="line-194"><span class="sd">        Sends a POST request with the `node_id` to the center&#39;s `/isek_center/deregister` endpoint.</span>
</span><span id="line-195">
</span><span id="line-196"><span class="sd">        :param node_id: The ID of the node to deregister.</span>
</span><span id="line-197"><span class="sd">        :type node_id: str</span>
</span><span id="line-198"><span class="sd">        :raises RuntimeError: If the Isek Center returns an error code in its response.</span>
</span><span id="line-199"><span class="sd">        :raises requests.exceptions.RequestException: For network errors or HTTP error statuses.</span>
</span><span id="line-200"><span class="sd">        &quot;&quot;&quot;</span>
</span><span id="line-201">        <span class="n">deregister_url</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">center_address</span><span class="si">}</span><span class="s2">/isek_center/deregister&quot;</span>
</span><span id="line-202">        <span class="n">payload</span> <span class="o">=</span> <span class="p">{</span><span class="s2">&quot;node_id&quot;</span><span class="p">:</span> <span class="n">node_id</span><span class="p">}</span>
</span><span id="line-203">
</span><span id="line-204">        <span class="k">try</span><span class="p">:</span>
</span><span id="line-205">            <span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Deregistering node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; at </span><span class="si">{</span><span class="n">deregister_url</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-206">            <span class="n">response</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">post</span><span class="p">(</span><span class="n">url</span><span class="o">=</span><span class="n">deregister_url</span><span class="p">,</span> <span class="n">json</span><span class="o">=</span><span class="n">payload</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="mi">10</span><span class="p">)</span> <span class="c1"># Added timeout</span>
</span><span id="line-207">            <span class="n">response_data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_handle_response</span><span class="p">(</span><span class="n">response</span><span class="p">,</span> <span class="sa">f</span><span class="s2">&quot;deregister node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39;&quot;</span><span class="p">)</span>
</span><span id="line-208">            <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; deregistered successfully. &quot;</span>
</span><span id="line-209">                        <span class="sa">f</span><span class="s2">&quot;Isek Center response: </span><span class="si">{</span><span class="n">response_data</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;message&#39;</span><span class="p">,</span><span class="w"> </span><span class="s1">&#39;OK&#39;</span><span class="p">)</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
</span><span id="line-210">        <span class="k">except</span> <span class="n">RequestException</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
</span><span id="line-211">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to deregister node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; due to a network/HTTP error: </span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</span><span id="line-212">            <span class="k">raise</span>
</span><span id="line-213">        <span class="k">except</span> <span class="p">(</span><span class="ne">RuntimeError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">)</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
</span><span id="line-214">            <span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Failed to deregister node &#39;</span><span class="si">{</span><span class="n">node_id</span><span class="si">}</span><span class="s2">&#39; due to Isek Center error: </span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</span><span id="line-215">            <span class="k">raise</span></div>
</div>

</span></code></pre></div>
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